“You know what? Forget the Shulchan Aruch. The Gemara doesn’t mention music. Nor do the Geonim. Nor does the Rambam. What do you guys want?“
The Rambam was of the shittah that music is always assur until the Beis Hamikdash returns, I believe. It came up once when learning the Yalkut Yosef where I think he asks exactly the questions you’re asking, and concludes that even if there is no real inyan of avoiding music during sefira (or maybe it was 3 weeks?), then you’re just being choshesh for the Rambam during these times, which is a good thing.
The points you’re making aren’t as insane as everyone is making them out, but they also aren’t as brilliant as you think. These have been addressed before and I really wish I could cite where it was in the Yalkut Yosef, but this was like 5 years ago so I couldn’t even begin to remember.